Pulley.



P atented Jan. l6, I900 J. BLACK.

PULLEY.

AypIicaticm filed Tuna 12 1899 "Wlllllllllllmmmm R f Zizv672?0 R Z/jzaei, 7T

STATES ATENT mo PULLEY.

SPECIFICATION forming part of Letters Patent No. 641,259, dated J anuary16, 1900.

Application filed June 12,1899. Serial No. 720,178. (No mocleli) T0 orwhom it may concern:

Be it known that 1, JOHN BLACK, a citizen of the United States, residingat Blue Island, Illinois, have invented certain new and usefulImprovements in Pulleys, of which the following is a specification.

The object of my improvement is to provide means for attaching orfastening a pulleyas, for instance, a window-sash pulleyin place withoutthe use of screws or similar devices; and my invention consists in thefeatures and details of construction hereinafter described and claimed.

In the drawings, Figure 1 is a front elevation showing a pulley in placein a windowcasing. Fig. 2 is a side elevation of the pulley and itsframe detached. Fig. 3 is a sectional vertical elevation taken on theline 3 of Fig. 1. Fig. 4 is a plan section taken on the line 4 of Fig.2, and Fig. 5 is a detached perspective View of one of my fastening-dogshereinafter described.

In making my improvement in pulleys intended to dispense with the screwsusually employed in fastening a window-sash pulley into thewindow-casing I'make a pulley-frame A, which for convenience andcheapness I prefer to make of sheet iron or steel, which may be bentinto shape to furnish the front plate a and the rearwardly-extendingside plates a, leaving the spaces between them open at the ends, so asto make an open-ended frame. The front plate is provided with an openingat ta so that the pulley-wheel, B may protrude slightly through thesame, as shown in Figs. 2 and 3. The pulley-wheel is provided with a hub19, which is mounted or journaled in the side pieces of the pulleyframethrough means of the pintle or bolt 19', holding it in place andpermitting it to rotate in the usual manner. Heretofore it has beenusually the practice to provide the front plate a of the pulley-framewith holes, through which screws have been inserted into the wood tofasten the pulley-frame and its pulley in place. Instead of this Iprovide the pulleyframe with dogs 0, made, preferably,as shown in Fig.5. As thus made, the dogs are struck out of sheet metal, with projectinglateral flanges c, which are intended to be inserted through holes inthe sides of the pulley-frame, as shown in Figs. 2 and 3, so as tofasten and retain the dogs in place. I provide the dogs with teeth 0,bent outward at their free ends, as shown in Figs. 3 and 5. These dogsbefore the pulley-frame is inserted are bent in so that their teeth willnot protrude beyond the ends of the sides of the pulley-frame, as shownin the upper dog in Fig. 3. After the pulley and frame have beeninserted in place the free ends of the dogs are forced out, so thattheir teeth are sunk or driven into the wood of the window-casing, asshown in the lower dog in Fig. 3. This may be done by inserting alongthe channel of the pulley-wheel the end of a blunt tool against the headof the dog and striking it with a hammer. When driven in, the teeth ofthe dog inclose a portion of the wood, as D, between the front plate ofthe frame and the teeth of the dog, thus preventing the removal ordisplacement of the pulley-frame and pulley-wheel. Of course, ifdesired, only one dog may be used and the other end of the pulley-frameheld in the usual Way by screws; but I think the use of dogs at eachend, as I have described above, will be found the preferable and moreeconomical use of the invention, and such is the way I recommend.

What I regard as new, and desire to secure by Letters Patent, is-- Thecombination of a pulley-frame having a front plate andrearwardly-extending side plates, a pulley-wheel mounted or journaled inthe side plates, and a dog or dogs fastened to the side plates near therear edge of the same and having their free ends bent outwardly atsubstan tially right angles and lying within the ends of the platesbefore the pulley-frame is inserted in place for use and adapted to beforced outward beyond the ends of the side plates to attach and fastenthe pulley-frame in place, substantially as do scribed. 1

JOHN BLACK.

Witnesses:

THOMAS A. BANNING, THOMAS B. MCGREGOR.

